Share 'Marey Tankless Water Heaters'

What do you guys think of these [URL="http://www.amazon.com/gp/product/B009EDGTXG/ref=as_li_ss_tl?ie=UTF8&amp;camp=1789&amp;creative=390957&amp;creativeASIN=B009EDGTXG&amp;linkCode=as2&amp;tag=ecorenovorg-20"]low cost water heaters[/URL]?
The Good: At $225 they are even cheaper than a tank water heater!! Can use standard B vent, no expensive SS venting required. Works with 1/2" gas lines. Igniter…